Silverbrook Research Pty Ltd

Lachlan Everett Hall

Kia Silverbrook

Damon Donald Ridley

Simone Charlotte Vonwiller

Scott Matthew Starling

Paul Lapstun

Simon Fielder

Sutharsiny Indusegaram

Graciel Gonzaga

Maxine Sintic

Alexandra Artemis Papadakis

A salt of a sulfonated dye modulates a stability of the dye, particularly its ozonefastness. The salt comprises an organic cation selected from the group consisting of: wherein:

Sulfonated dye salts having improved stability

A method of formulating an aqueous ink having minimal visible coloration. The method includes the steps of: providing an aqueous ink formulation containing a sulfonated water-soluble IR-absorbing naphthalocyanine dye having a central metal atom moiety; and adjusting a pH of the formulation to a pH value in the range of 4 to 6.5 so as to minimize visible coloration of the formulation.

Method of formulating ink having minimal visible coloration

An ink cartridge for an inkjet printer contains an aqueous ink formulation. The ink formulation comprising an IR-absorbing naphthalocyanine dye of formula (II): or a salt form thereof, wherein:M is Ga(A);Ais an axial ligand selected from &#x2014;OH, halogen, &#x2014;OR, &#x2014;OC(O)Ror &#x2014;O(CHCHO)Rwherein e is an integer from 2 to 10 and Ris H, Calkyl or C(O)Calkyl;Rand Rmay be the same or different and are selected from hydrogen or Calkoxy;Ris selected from Calkyl, Caryl, Carylalkyl or Si(R)(R)(R);Ris selected from Calkyl, Caryl or Carylalkyl; andR, Rand Rmay be the same or different and are selected from Calkyl, Caryl, Carylalkyl, Calkoxy, Caryloxy or Carylalkoxy.The ink formulation has a characteristic pH in the range of 4 to 6.5.

Ink cartridge comprising weakly acidic naphthalocyanine ink formulation

A method of modulating a stability of a sulfonated dye, particularly its ozonefastness is provided. The method comprises providing a salt of the dye, wherein the salt comprises at least one organic cation selected from the group consisting of: wherein:

Method of modulating stability of sulfonated dye

An aqueous formulation comprises a sulfonated water-soluble IR-absorbing naphthalocyanine dye having a central metal atom moiety. A pH of the formulation is in the range of 4 to 6.5, which minimizes visibility of the formulation.

Aqueous formulation comprising low visibility naphthalocyanine dye

An inkjet ink comprising an IR-absorbing dye of formula (A): wherein

Inkjet containing phthalocyanine dye with non-planar groups

An inkjet ink for use in netpage, Hyperlabel and other applications. The ink includes an IR-absorbing dye of formula (I): wherein

Inkjet ink comprising gallium naphthalocyanine dye

A substrate having an inkjet ink disposed thereon. The ink comprises an IR-absorbing naphthalocyanine dye of formula (I): 

Substrate having inkjet ink comprising naphthalocyanine dye disposed thereon

A substrate having an IR-absorbing dye disposed thereon. The IR-absorbing dye is a metal phthalocyanine dye having branched axial ligands. The branched axial ligands minimize interaction between &#x3c0; systems of adjacent dye molecules, and assist in reducing absorption of visible wavelengths.

Substrate having IR-absorbing dye with branched axial ligands

An IR-absorbing naphthalocyanine dye of formula (I): whereinM is Ga(A);Ais selected from the group consisting of: OH and halogen; andW is a sulfonic acid group or salts thereof.

IR-absorbing gallium naphthalocyanine dye

The present invention provides an inkjet ink comprising an IR-absorbing naphthalocyanine dye of formula (I): wherein

Inkjet inks for printing coded data comprising naphthalocyanine dyes

A method of preparing a macrocyclic metal cyanine. The method comprises the step of providing a corresponding macrocyclic metal-free cyanine compound dissolved in a solvent and adding a metal reagent thereto. The metal reagent is highly soluble in the solvent and typically comprises one or more organic ligands.

Method of preparing macrocylic metal cyanine compound

A method of printing an IR-absorbing dye onto a substrate whilst minimizing visible coloration of the substrate. The method comprises: (i) preselecting the dye from a metal-cyanine of formula (I): Q, Q, Qand Qare the same or different and are independently selected from a Carylene group or a Cheteroarylene group;M is selected from Si(A)(A), Ge(A)(A), Ga(A), Al(A), Mn(A), Fe(A), Sn(A)(A), Pb(A)(A);Aand Amay be the same or different and are axial ligands comprising a group for reducing {tilde over (&#x25a1;)}-&#x25a1; interactions between adjacent dye molecules; and (ii) printing the dye onto the substrate.

Method of printing an IR-absorbing dye onto a substrate

A substrate having an IR-absorbing dye disposed thereon. The dye is a naphthalocyanine dye of formula (I): wherein

Substrate having gallium naphthalocyanine salt disposed thereon

A method of enabling entry of data into a computer system via a printed form is provided. The method comprises the steps of: (i) providing the printed form, the form containing human-readable information and machine-readable coded data, the coded data being indicative of an identity of the form and of a plurality of locations on the form; (ii) operatively positioning a sensing device relative to the form; (iii) sensing at least some of the coded data; (iv) generating indicating data using the sensed coded data, the indicating data being indicative of the identity of the form and the position of the sensing device relative to the form; and (v) sending the indicating data to a computer system, thereby enabling the computer system to identify the data for entry. The coded data comprises an ink composition containing an IR-absorbing dye and a singlet oxygen quencher.

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Balmain, Australia

Lachlan Everett Hall